openai_transcription_settings.json

{
  "type": "transcription_session.update",
  "session": {
    "input_audio_format": "pcm16",
    "input_audio_transcription": {
      "model": "gpt-4o-transcribe",
      "prompt": "",
      "language": "en"
    },
    "turn_detection": {
      "type": "server_vad",
      "threshold": 0.4,
      "prefix_padding_ms": 200,
      "silence_duration_ms": 300
    },
    "input_audio_noise_reduction": {
      "type": "near_field"
    }
  }
}